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    //冒泡排序 
    let arr = [12, 4, 6,42 , 8, 19, 5, 28, 22, 36, -15, 5];

    // 从大到小排序
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    for(let i = 1; i < arr.length; i++){
      for(let j = i; j < arr.length-i; j++){
        if(temp < arr[j]){
          
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